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Disconnectable pulley device

A pulley, separate technology, applied in the field of flywheels, can solve the problems of lack of responsiveness and increased cost and price of the device

Inactive Publication Date: 2008-05-14
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The disadvantage of this device is the use of two cages, one of which is provided with friction elements made in the form of clips, increasing the cost price of the entire device
[0014] Additionally, during flywheel operation, since the cam is no longer in contact with the driven shaft, the unit lacks the responsiveness required to quickly switch from idle to torque transmitting operation in certain applications

Method used

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  • Disconnectable pulley device
  • Disconnectable pulley device
  • Disconnectable pulley device

Examples

Experimental program
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Embodiment Construction

[0052] As shown in FIGS. 1 and 2 , the separable pulley device 1 comprises: a pulley 2 , an internal transmission element 3 such as a hollow shaft, two rolling bearings 4 and 5 and a flywheel 6 .

[0053] The pulley 2 of the shaft 7 has an outer surface on which a grooved area 2a having an annular groove and an axial area 2b formed at the axial end of the grooved area 2a are provided. The pulley 2 comprises a cylindrical bore 2c extending over the entire length of the pulley 2, except for chamfers 2d and 2e at each axial end, and two radial cross-sections 2f and 2g.

[0054] The inner transmission element 3 takes the form of a hollow shaft with a cylindrical axially outer surface 3a with chamfers (not shown) at each axial end. The inner transmission element 3 also has a hole 3b, part 3c of which is threaded, so that the shaft of the alternator is fixed at the end and driven (not shown).

[0055] The rolling bearing 4, coaxial with the shaft 7, comprises an inner ring 8 and an o...

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Abstract

The invention relats to a disengageable pulley device includes a pulley mounted on an inner transmission element, and a freewheel provided with a plurality of lock-up elements mounted between a sliding track of the pulley and a sliding track of the inner transmission element. The device is provided with a cage for the lock-up elements, with at least one annular friction element provided between the cage and the sliding track of the inner transmission element to use friction to connect the cage and the said inner element, and with at least one elastic return element positioned between at least one lock-up element and the cage, the elastic return element tending to keep the lock-up elements in contact with the sliding tracks when the freewheel is in the coupled position and in the uncoupled position.

Description

technical field [0001] The present invention relates to the field of flywheels. Background technique [0002] More specifically, the present invention relates to the field of separable pulleys incorporating and using freewheels, such as automotive alternator drive pulleys. [0003] Such separable pulleys are known per se and are increasingly used to overcome the deleterious effects of off-cycle operation or sudden engine deceleration occurring in internal combustion engines, especially at low engine speeds and more particularly in diesel engines. [0004] What happens is that the drive belt connected to the engine through the crankshaft pulley slows down rapidly, while the driven pulley, such as the generator pulley, tends to continue turning at the same speed due to inertia. [0005] If there is a rigid connection between the crankshaft pulley and the generator shaft, the belt is subject to significant stress during sudden speed changes. [0006] This variation has delete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D41/07F16H55/36
CPCF16D41/07
Inventor 让-卢克·加德勒弗朗西斯·克劳德贝努瓦·阿诺特
Owner AB SKF